readFileSync now compatible with node .8 and .10

https://github.com/joyent/node/wiki/Api-changes-between-v0.8-and-v0.10
FS readFile(), writeFile(), appendFile() and their Sync counterparts
now take an options object (but the old API, an encoding string, is
still supported)
Merge pull request #2 from dahmian/master

loadFileSync node v0.8 fix